Uncommon Comfort. The Alisa Luxury Firm mattress collection contains the 800 series Beautyrest® Pocketed Coil® Springs that provide conforming back support, adjusting to your unique figure in all the right places. SurfaceCool™ Fibers dissipate heat away from the surface, helping you achieve and maintain your ideal sleep temperature for optimum rest. Gel Touch® Foam provides exceptional surface contouring, cushioning and conformability. AirCool® BeautyEdge™ Foam Encasement enhances airflow through the mattress and offers support and stability to the edge. The Triton® foundation offers superior durability. Sleep will never be the same again. Set includes Twin mattress and foundation.